EPA Air · stack tests by county and year
Air-emissions stack tests in Davis County, Utah, 2026
- 10Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Davis County, Utah during 2026. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Davis County facility page.
Davis County, Utah, 2026
Air-emissions stack tests in Davis County, other years
Air-emissions stack tests recorded in Davis County, Utah, 2026
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2026-05-22 | HF SINCLAIR WOODS CROSS REFINERY (FORMERLY HOLLY) | Pass | State |
| 2026-05-20 | BIG WEST OIL | Pass | State |
| 2026-05-20 | HF SINCLAIR WOODS CROSS REFINERY (FORMERLY HOLLY) | Pass | State |
| 2026-05-19 | BIG WEST OIL | Pass | State |
| 2026-05-18 | HF SINCLAIR WOODS CROSS REFINERY (FORMERLY HOLLY) | Pass | State |
| 2026-05-11 | HF SINCLAIR WOODS CROSS REFINERY (FORMERLY HOLLY) | Pass | State |
| 2026-04-29 | HF SINCLAIR WOODS CROSS REFINERY (FORMERLY HOLLY) | Pass | State |
| 2026-04-29 | HF SINCLAIR WOODS CROSS REFINERY (FORMERLY HOLLY) | Pass | State |
| 2026-04-27 | HF SINCLAIR WOODS CROSS REFINERY (FORMERLY HOLLY) | Pass | State |
| 2026-04-22 | HF SINCLAIR WOODS CROSS REFINERY (FORMERLY HOLLY) | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.